ADDING AND SUBTRACTING DECIMALS

TIPS

First, you must remember to add or subtract decimals, add or subtract digits in the same place value.
Next, be sure to line up the decimal points before you add or subtract.

HOW TO ADD AND SUBTRACT DECIMALS.

Lesson 1:Adding Decimals
Find the sum of 14.7+3.2
First, estimate the sum:15+3=18
Next, line up the decimal points:
14.7
+ 3.2
17.9
Compare the answer to the estimate:since 17.9 is close to 18, the answer is reasonable.
Lesson 2:Subtracting Decimals
Find the difference between 3.876 - 2.173
First, estimate the difference:4.000-2.000=2.000
Next, line up the decimal points:
3.876
-2.173
1.703
Compare the answer to the estimate: since 1.703 is close to 2.000, the answer is reasonable.
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ADDING AND SUBTRACTING DECIMALS

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